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diff --git a/test/CodeGen/X86/webkit-jscc.ll b/test/CodeGen/X86/webkit-jscc.ll
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+++ b/test/CodeGen/X86/webkit-jscc.ll
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+; RUN: llc -mtriple=x86_64-apple-darwin -mcpu=corei7 < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-linux-gnu -mcpu=corei7 < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-windows-gnu -mcpu=corei7 < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-windows-msvc -mcpu=corei7 < %s | FileCheck %s
+
+define webkit_jscc i32 @simple_jscall(i32 %a, i32 %b, i32 %c) {
+ %ab = add i32 %a, %b
+ %abc = add i32 %ab, %c
+ ret i32 %abc
+}
+
+; 32-bit integers are only aligned to 4 bytes, even on x64. They are *not*
+; promoted to i64.
+
+; CHECK: simple_jscall:
+; CHECK: addl 8(%rsp), %eax
+; CHECK-NEXT: addl 12(%rsp), %eax
+; CHECK-NEXT: retq